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Authors: Mateusz Dubiel 1 ; Minoru Nakayama 2 and Xin Wang 3

Affiliations: 1 Dept. Computer and Information Sciences, The University of Strathclyde, U.K. ; 2 Dept. Information and Communications Engineering, Tokyo Institute of Technology, Japan ; 3 National Institute of Informatics, Japan

Keyword(s): Speech Processing, Synthetic Speech Evaluation, Pupillometry, Cognitive Workload.

Abstract: Pupillometry has recently been introduced as a method to evaluate cognitive workload of synthetic speech. Prior research conducted on English speech indicates that in noisy listening conditions, pupil dilation is significantly higher for synthetic speech as compared to natural speech. In a lab-based listening experiment, we evaluated participants’ (n=16) pupil responses to Japanese speech (natural vs. synthetic) at three different signal-to-noise levels (-1dB, -3dB and -5dB). Our research expands on previous work by evaluating pupillary responses both in terms of temporal changes in pupil size and degree of pupil oscillations. We observe statistically significant differences in pupil sizes at the recall stage between each type of speech. For pupil oscillations, we register statistically significant differences in frequency power spectrum densities (PSDs). Our investigation proposes an expansion of the current synthetic speech evaluation methods that are based on pupillary responses a nd outlines possible avenues for future research that arise from the findings of this work. (More)

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Paper citation in several formats:
Dubiel, M.; Nakayama, M. and Wang, X. (2021). Evaluating Synthetic Speech Workload with Oculo-motor Indices: Preliminary Observations for Japanese Speech. In Proceedings of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2021) - BIOSIGNALS; ISBN 978-989-758-490-9; ISSN 2184-4305, SciTePress, pages 335-342. DOI: 10.5220/0010341300002865

@conference{biosignals21,
author={Mateusz Dubiel. and Minoru Nakayama. and Xin Wang.},
title={Evaluating Synthetic Speech Workload with Oculo-motor Indices: Preliminary Observations for Japanese Speech},
booktitle={Proceedings of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2021) - BIOSIGNALS},
year={2021},
pages={335-342},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0010341300002865},
isbn={978-989-758-490-9},
issn={2184-4305},
}

TY - CONF

JO - Proceedings of the 14th International Joint Conference on Biomedical Engineering Systems and Technologies (BIOSTEC 2021) - BIOSIGNALS
TI - Evaluating Synthetic Speech Workload with Oculo-motor Indices: Preliminary Observations for Japanese Speech
SN - 978-989-758-490-9
IS - 2184-4305
AU - Dubiel, M.
AU - Nakayama, M.
AU - Wang, X.
PY - 2021
SP - 335
EP - 342
DO - 10.5220/0010341300002865
PB - SciTePress

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